US3191208A

US3191208A - Buffing wheel

Info

Publication number: US3191208A
Application number: US188790A
Authority: US
Inventors: George R Churchill
Original assignee: GEORGE R CHURCHILL CO Inc
Current assignee: Jackson Buff Corp
Priority date: 1962-04-19
Filing date: 1962-04-19
Publication date: 1965-06-29
Anticipated expiration: 1982-06-29

Description

June 1965 G. R. CHURCHILL 3,191, 08

BUFFING WHEEL Filed April 19, 1962 s Sheets-Sheet 1 24 FIGS INVENTOR.

GeorgeQ. Churchill BY I.

A T TOR/VEY J1me 1965 e. R. CHURCHILL BUFFING WHEEL 3 Sheets-Sheet 2 Filed April 19, 1962 PIC-5.5

1N VEN TOR. George Church/YI- PMM A T TOQNE Y June 29, 1965 s. R. CHURCHILL 3,191,208

BUFFING' WHEEL Filed April 19, 1962 3 Sheets-Sheet 3 ATTORNEY United States Patent 3,191,208 BUFFENG WHEEL George R. @hurchill, Cohasset Mass, assignor to George R. Churchill Company, Inc, Hingham, Mass, a corporation of Massachusetts Filed Apr. 19, 1962, Ser. No. 188,790 10 Qlaims. (Ci. 15230.17)

This invention relates to a bufling wheel.

The invention has for a principal object the provision of a novel buffing wheel structure embodying a novel and improved retaining member whereby the buffing wheel may be rapidly and economically manufactured.

A further object of the invention is to provide a bufiing wheel which is characterized by a plurality of preformed rings of bufling elements or turns of a length of buffing material which are assembled by means of novel retaining means into individual relatively wide faced bufling wheel sections.

A still further object of the invention is to provide novel and improved retaining means particularly adapted for use in the manufacture of relatively wide-faced buiiing wheels whereby the buffs may be rapidly assembled and labor and material costs substantially reduced.

With these general objects in view and such others as may hereinafter appear, the invention consists in the novel and improved bufiing wheel and in the novel retaining means hereinafter described and particularly defined in the claims at the end of this specification.

In the drawings illustrating the preferred embodiment of the invention:

'FIG. 1 is a plan view of the retaining disk employed in the manufacture of the present bufiing wheel;

FIG. 2 is a front elevation of the retaining disk of FIG. 1 with the prongs turned at right angles to the base of the disk;

-FIG. 3 is a cross section taken on line 33 of FIG. 2;

FIG. 4 is a perspective view of one form of the present buffing wheel;

FIG. 5 is a cross section taken on line 5-5 of FIG. 4;

FIG. 6 is a perspective view of another form of the present bufiing wheel;

FIG. 7 is a cross section taken on line 7'7 of FIG. 6;

'FIG. 8 is a perspective view of still another form of the present buffing wheel; and

FIG. 9 is a cross section taken on line 99 of FIG. 8.

In general the present invention contemplates a novel and improved buffing wheel embodying a novel and imtively long, metal teeth arranged around the periphery of the disk. The teeth extend substantially at right angles to the face of the disk and are provided with an inner vconcavesurface and an outer convex surface providing a reinforcing rib. The disk is adapted to be positioned against one side of an assembly of annular closed rings of bufiing material, the prongs being pressed into and through the buffing material adjacent its inner periphery and clinched over on the opposite side thereof.

In one form of the invention the butfing wheel comprises a plurality of turns of a length of buffing material retained in side-by-side compacted relation by means of the prongs extended through the material with the pointed ends thereof clinched over on the opposite side of the assembly.

In another form of the invention the prongs are extended through a plurality of rings of connected, radially extended, individual bufiing elements and clinched over weaving wires connecting the elements together, thus providing an individual multisection bufiing wheel.

Referring now to the drawings and to FIG. 1 in particular, It) represents a circular metal disk having a central arbor hole 12 defined by an annular upstanding rim 14. A plurality of spaced, relatively long prongs 16 are arranged around the outer periphery of the disk, and a plurality of relatively short projections 18 are disposed between each of the prongs 16. As shown in FIG. 2, the marginal edge of the disk is bent along a line spaced inwardly a short distance from the base of the prongs 116, 18 such that the prongs are positioned substantially at right angles to the flat surface 17 of the disk, and an upstanding annular rim 20 is provided between the base of the prongs 16, 1-8 and flat surface '17 of the disk. The annular rim 2% increases the strength of the prongs since the prongs themselves are not weakened during the bending operation. In addition, the rim 20 increases the holding power of the disk '10 since the rim is embedded into the buffing material, the material being retained under the rim by the prongs 1f clinched over on the opposite side of the buffing wheel as will be hereafter described. The height of rim 2% may also be varied to provide a spacing when the bufiing wheel sections are assembled on an arbor.

The particular cross sectional shape of the prongs 16 illustrated in FIG. 3 is an important feature of the present invention since it lends strength to the prongs. The in ner surface 22 is substantially concave in cross sectional shape and the outer surface substantially convex, thereby forming a rib 24 on the outer surface. The rib 24 provides the prongs is with additional rigidity and resistance to bending to enable them to be driven through the bufiing material to secure the buffing wheel together and provide a support to enable the buffing wheel to be mounted on an arbor. The buffing wheel illustrated in FIG. 4 consists of a plurality of turns of an elongated multi-ply strip of butfing material 26 compacted together side by side. The disk it) is placed on one surface thereof with the prongs 16 against the buifing material adjacent the inner periphery thereof. The prongs 16 are then driven through the compacted turns in any preferred manner, the ends 28 of the prongs 16 being clinched over as shown.

The buffing material 25 comprises a plurality of layers of elongated strips of cloth or other bufling material cut on the bias to prevent unraveling thereof folded medially around an elongated wire 3i). The folded cloth is gathered longitudinally on the wire .30 to provide a puckered face 32 as shown. In order to retain the buffing material 26 in its gathered condition on the wire 30 so that the material may be stored prior to its assembly into a bufiing wheel a suitable rapid drying adhesive is applied on the inner surface of the top strip of bufling material either prior to or during the folding and gathering operation, which upon drying holds the material in place. As shown, the folded and gathered cloth strip is helically wound on itself to provide two turns 34, 136 and the pronged disk 10 positioned on one side surface, the prongs being driven by suitable means, not shown, through the layers of each turn and clinched over the wire 30 within the outer turn '36. The sharp ends 23 of the prongs are turned inwardly and embedded in the cloth under the wire 30. Thus, the assembly of helically wound turns of buffing material is retained permanently in its helically wound condition and provides a buffing wheel wherein the bufiing surface 3 2 provided by this construction comprises a relatively wide, wavy puckered surface, each turn being disposed at an angle to present the bufing surface at an angle with respect to the work being buffed. This surface provides an efiicient compound holding surface and a surface which provides a cross cutting action across the surface of the work being buffed to thereby give a highly satisfactory finish to the work.

It will be understood that with the present retaining disk 'the number of turns of bufiing material utilized in the formation of the present bufling wheel maybe varied in accordance with the length of the disk prongs lfi to thereby increase or decrease the width of the face of the the butfing wheel. It will also be apparent that the present bufiing wheel, in effect, reduces the time required to assemble the bufiing setup since each wheel is preferably composed of a plurality of turns, each equal to a conventional individual buffing Wheel section.

FIG. 6 illustrates another form of buffing wheel embodying the present invention. The buifing wheel 40 comprises a plurality of radially extended individual bufling elements 42 connected together adjacent their inner ends by weaving wires 44. The connected buffing elements 42 are formed into a closed ring and, as illustrated, each element comprises a plurality of twisted strands of fibrous material 46, and each of the component strands is preferably of a laid construction similar to that used in the production of heavy sisal twine or rope. The bundles of twisted fibrous strands are enclosed in'a cloth wrapper 48,,

and the cloth wrapped element is longitudinally stitched by adding rows of stitching 50. Preferably, a pair of closed rings of radially extended butfing elements are superimposed one upon the other, and the pronged 'disk I 10 is placed against one side of the assembly with the prongs 16 against the bufling elements 42 adjacent its inner periphery. The prongs 16 are then driven through the individual elements 42 of each ring and are clinched over the weaving wires 52 of the closed ring on the opposite side of the assembly. A row of staples 54 is inserted adjacent the inner periphery of the assembly such that a leg of each staple extends into adjacent elements 42. It will be understood that if it is desired to use a light gauge metal disk 10 it is preferable to use one or more rows of 4 turned inwardly and embedded into the buffing elements.

From the foregoing description it will be apparent that the present retaining disk enables various types of buffing wheels to be manufactured in a rapid and efficient manner whereby any possibility of the assembly breaking or flying apart during use is substantially eliminated, the present structure of the prongs providing increased strength and holdingpower.

The present invention provides a bufling wheel structure which may be rapidly and economically manufactured whereby production may be substantially increased, the disk being attached to the bufling wheel in an automatic press and expensive labor and material-costs reduced to a minimum.

It will also be understood that the present invention enables bufiing wheels of varying thicknesses to be, assembled utilizing the pronged disk either by varying the length .of the prongs or the amount of each prong which is clinched over. j j

Haying thus described the invention, what is claimed is;

1. A bufling wheel section comprising a continuous length of bufiing material folded around and secured to a length 'of wire, said length of bufling material being helically woundand compacted together to provide a closed ring composed of'a plurality of turns, and a single retaining disk having portions extending through and clinched over the buffing material forsupporting and permanently securing the assembly of turns together to provide a bufiing wheel section having a helical working surface.

2. A bufiing wheel section as defined in claim 1 wherein said single retaining disk comprises a flat annular plate having a plurality of spaced, pointed prongs bent at right angles to the surface of the flat plate, said prongs extending completely through the buffing material, the ends of the prongs being clinched over and embedded into the butting materialon theside opposite the plate. I

3. A buffing wheel section as defined in claim 2 wherein each prong is provided with an elongated stiffening .rib to provide sufficient rigidity to enable the prongs to be pressed through the buffing material without bending.

- 4. A bufiing wheel section as defined in claim 2 wherein the ends of the prongs are clinched over the length of wire present buffing wheel has been described as comprising a plurality of closed rings of radially extended connected bufling elements, it will be understood that the bufiing wheel may be constructed from a length of connected individual bufling elements helically wound upon itself to provide, preferably, two turns of material, the retaining disk 10 being assembled to connect the turns of the'length of helically wound bufling elements securely together in the same manner as described in connection with a two or more ringed structure.

A still further modified form of the trated in FIGS. 8 and 9 wherein a plurality of radially extended individual bufling elements 58 connected together at their inner ends by weaving wires 60 are formed into.

inventionis illusa closed ring, and wherein a plurality of such rings are of turns, the assembly being permanently secured together I by the retaining disk 10, the prongs 16 of the retaining disk 10 being clinched over the weaving wires 60 and and embedded'in the buffing material.

7 5. Anew article of manufacture for use in assembling the base, of the prongs and the face of; the disk affordingv rigidity such as to prevent deforming of the plate and the prongs when assembled with a buffing wheel section at right angles to said one face of the disk. 6. A new article of manufacture as defined in claim 5 whereineach prong is provided with a longitudinal rib .to add further rigidity to the prongs to withstand assembly with said section without deformation. I i

7. A new article of manufacture as defined in claim 5 wherein said prongs comprise-a plurality of relatively long prongs adapted to be extended through the buffing wheel section, and a plurality of relatively short V-shaped prongs between each of said long prongs adapted to be embedded into the adjacent face of the bufiing wheel section. n '8. A bufling'wheel section comprising a ring of wire connected, radially extending 'bufling elements, a single supporting disk member having a central opening therein and an annular rim around the outer periphery of the disk, a plurality of elongated prongs extended from the periphery of said rim, said rim and prongs extending at right angles to one face of the disk, said prongs being driven through the ring of butfing elements adjacent the inner periphery thereof, the ends of the prongs being clinched over' said Wires and embedded in the buifing material to thereby permanently secure the bufling wheel section together.

9. A bufling wheel section as defined in claim 8 wherein at least one row of staples is provided around the disk adjacent said rim and extended through the disk and ring of bufiing elements.

10. A buffing wheel section comprising a ring of hutfing material, a single sheet metal supporting disk having a central opening therein and provided with a circular flange extending at right angles to the outer periphery of the disk, a plurality of spaced elongated prongs extending from said flange and having a pointed projection between adjacent prongs, said prongs being driven through the ring of buffing material adjacent the inner periphery thereof, said pointed projections being embedded into one face of the ring and the ends of said prongs being clinched over and embedded into the opposite face of the ring to clamp the ring of bufiing material between said pointed projections and said clinched prongs.

References Cited by the Examiner UNITED STATES PATENTS 2/98 Pain 15-181 9/35 Frost 15-181 4/43 Peterson 51-193 11/48 Seelenfreund 51-193 5/51 Staiford 51-193 7/52 Lawler 5 1-193 12/53 Ruthven 51-193.] 6/55 Davies 51-193 2/59 Churchill 51-193 4/59 Mockiewicz et al 51-193 12/60 Nelson.

FOREIGN PATENTS 12/ 57 Great Britain.

LESTER M. SWINGLE, Primary Examiner.

20 FRANK H. BRONAUGH, Examiner.

IJNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3,191,268 June 29, 1965 George R. Churchill It is hereby certified that error appears in the above mnnbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 4, lines 53 and 54, strike out "at right angles to said one face of the disk".

Signed and sealed this 1st day of February 1966.

(SEAL) Attest:

ERNEST W. SWIDER Attesting Officer EDWARD J. BRENNER Com ssioner of Patents

Claims

1. A BUFFING WHEEL SECTION COMPRISING A CONTINUOUS LENGTH OF BUFFING MATERIAL FOLDED AROUND AND SECURED TO A LENGTH OF WIRE, SAID LENGTH OF BUFFING MATERIAL BEING HELICALLY WOUND AND COMPACTED TOGETHER TO PROVIDE A CLOSED RING COMPOSED OF A PLURALUTY OF TURNS, AND A SINGLE RETAINING DISK HAVING PORTIONS EXTENDING THROUGH AND CLINCHED OVER THE BUFFING MATERIAL FOR SUPPORTING AND PERMANENTLY SECURINGH THE ASSEMBLY OF TURNS TOGETHER TO PROVIDE A BUFFING WHEEL SUCTION HAVING A HELICAL WORKING SURFACE.